Find the domain.f(x) = 
A. {x|x ? 8} or [8, ?)
B. {x|x ? -8} or [-8, ?)
C. {x|x ? 0} or [0, ?)
D. All real numbers or (-?, ?)
Answer: A
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Sketch the graph and show all local extrema and inflection points.y = x + sin x, 0 ? x ? 2?
A. Local minimum: (0, 0)
Local maximum: (2?, 2?)
Inflection point: (?, ?)
B. Local minimum: (0, 0)
Local maximum: (2?, 2?)
No inflection points
C. Local minimum: (0, 0)
Local maximum: (2?, 2?)
Inflection point: (?, ?)
D. Local minimum: (0, 0)
Local maximum: (2?, 2?)
No inflection points
Solve.If the average cost per unit C(x) to produce x units of plywood is given by 
what is the cost per unit if 20 units of plywood are produced?
A. $1.50 B. $75.00 C. $21.43 D. $25.00
Classify the system as either consistent or inconsistent.
A. Inconsistent B. Consistent
Perform the indicated operation. Assume that all variables are nonnegative.
(3
- 1)
A. 2
B. 
- 
C. 8
D. 9 - 1